Cleanup python version properties am: a545f5b3b6

Original change: https://android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/3517118

Change-Id: Ia909df70ff452b44e25ed0f87830e08949eb3e8a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>